Ready for a Monstober spooktacular? As the girls gain the power to teleport, whats more terrifying then hanging in a haunted house? Turning into one of the .\rbr\rbr\rbr\rbrA NEW #Monstober Best Friends Whenever premieres on Sunday, October 4 at 8:30pm guest starring Peyton Meyer and Rowan Blanchard from Girl Meets .\rbr\rbrReady for a Monstober spooktacular? As the girls gain the power to teleport, whats more terrifying then hanging in a haunted house? Turning into one of the .\rbr\rbrSpecial halloween episode - Cyd And Shelby from Best Friends Whenever Guest star - Brand new Sunday october 4 on Disney Channel.